import java.util.*;
import java.io.*;
public class JavaIO {
        public static PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
        public static Read in = new Read();

        public static void main(String[] args) throws IOException
        {
            // 写代码
            out.close();
        }
    }
class Read // 自定义快速读入
{
    StringTokenizer st = new StringTokenizer("");
    BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
    String next() throws IOException
    {
        while(!st.hasMoreTokens())
        {
            st = new StringTokenizer(bf.readLine());
        }
        return st.nextToken();
    }

    String nextLine() throws IOException
    {
        return bf.readLine();
    }

    int nextInt() throws IOException
    {
        return Integer.parseInt(next());
    }

    long nextLong() throws IOException
    {
        return Long.parseLong(next());
    }

    double nextDouble() throws IOException
    {
        return Double.parseDouble(next());
    }
}
